Lead product.



PATENTED MAR. 5, 1907.

J. W. BAILEY. LEAD PRODUCT. APPLIOATION FILED JUNE 26, 1902.

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WITNESSES: 4 2 2 BY ATTO NEYS 7 O 9 5 R A M D E T N E T A P LEADPRODUCT. APPLICATION FILED JUNE 26, 1902.

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ATTORNEY quiring many weeks and even months for 1ts expensive separatingand cleansing opera.-

, and. uniformly transformed into the, ordi- -lead in a form whichpermits of its use in va- UNITED STATES PATENT OEEIOE.

JOHN W. BAILEY, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TOUNITED LEAD COMPANY, A CORPORATION OF NEW JERSEY.

LEAD PRODUCT- Specification of Letters Patent. Patented March 5, 1907.

Application filed Tune 26. 1902. Serial No. 113,213. To all whom it mayconc rn: l nary lead pigments and other compounds, Be it known that 1',JOHN W. BAILEY, a I such as white lead, litharge, or red lead, andcitizen of the United States, and a resident of 1 this without anysubstantial waste and Withand whose post-office address is 555 West outrendering it necessary to resort to ex- One Hundred and Eighty-thirdstreet, New I pensive and troublesome cleansing or other York city, inthe county and State of New l finishing operations in order to produce aYork, have invented certain new and useful pure and superior finalproduct. This 1116- Improvements in Lead Products, of which tallicpowder may also be employed in its the following is a specification.pure or uncombined state as a pigment or as My invention relates to alead product;

and it has for an object to provide metallic compounds. I have foundthat by sub ectl ing the metallic lead to the action of rapidlymovingbeaters the material may be reduced to .tho dust-like form abovedescribed and that by continuing the process the material may be reducedto any desired degree of fineness. This disintegrating or pulverizingprocess may be, and preferably is, carried to such a point that thematerial may be rious compounds, chemical and mechanical.

A more especial object of the invention, however, is to produce themetal in a form which greatly facilitates its chemical union with othersubstances.

In prior processes Where metallic lead has been treated for theproduction of substances or compounds of which lead is the base, as inprocesses for producing lead pigments, and particularly in the processesof making lead carbonate, or the white lead of commerce, the lead hasbeen produced in a comminuted form, sometimes in the form of thinspangles, such as result from dropping the molten metal on suitablesurfaces, sometimes in the form of a fiber produced by pouring themolten metal through small openings into a suitable cooling medium, andsometimes in the form of a coarse sand-like powder, such as thatproduced by directing a blast of compressed air or a jet of superheatedsteam through a stream or the molten metal. A chemical process in whichthe lead is treated in either of these for'rr. sis necess'arily slow,the ordinary process of making lead carbonate by corrosion, forinstance, re-

and diil'used throughout a body of air or gas and while in thiscondition uniformly subjected to the action of chemical agents, wherebya rapid and complete chemical union of every particle of the metal withother substances may be effected. The material may also be caused tounite with other substances in various other ways, as by agitating abody of the same, heated to a suitother substance or substances.

In accordance with the preferred method of producing the new leadproduct the material is first comminuted to a suitable degree moltenmetal to a jet of air or steam, as above described. The comminuted metalis then supplied, preferably in a substantially continuous manner, to achamber in which more heaters are in such a completion. There is,moreover, one or I l process alwaysa large percentage of waste in speed,and a current of air is maintained thepulverizingchamber thedegree of;e-

through convey away the stock, owing, among other 1 reasons, to the lackof uniformity in the sizes of the par ticles and to the irregularity inthe subjection of the same to the chemical a'ctionof the othersubstances. To remove this waste,

tions are required. II

VI have discovered may, be reduced to that the metallic lead the form ofa dust or an impalpable and practically, amorphous powder and that whenitis subjected to chemical action in this condition it is rapidly apurely mechanical ingredient in various rotated at a high conveyed bycurrents of air or other gases able temperature in the presence of theof fineness, as by'subjecting a stream of the I ICC ness of the materialmay be easily and rately controlled. While this process of producing thenew product is preferred, it is possible that the product may beproduced in other ways, as by a grinding or abrading process, and it isto be understood, therefore, that my invention, as far as the product isconcerned, is not limited to any particular process of producing theproduct.

The new product may be substantially pure metal or it may be a mixtureof the metal and an oxid thereof. It has a darkgray color, and it leavesa mark like that of a piece of pure lead. It .is a very heavy powder,and it feels smooth to the touch, somewhat like powdered graphite.

In order that the method of producing my product may be more perfectlyunderstood, 1

ave illustrated in the accompanying drawings, which are referred toherein and form a part hereof, and will now describe an appa ratusadapted to carry out the process, said apparatus forming the.subject-matter of a copending application, Serial N o. 1 13,214. It

is to be understood, however, that the process maybe carried out byother forms of aparatus, the form shown being selected only y way, ofexample.

Of the drawings, Figure 1 is a side elevation of a complete machineconstructed in accordance with my invention. Fig. 2 is a verticalsection of the machine, and Fig. 3 is a central transverse section ofthe same.

Referring to the drawings in detail, 1 represents a suitable casingforming the pulverizini-chamber. This casing, as illustrated, is sustantially cylindrical in form, and within it are arranged side by sidea plurality of rotary beaters. In accordance with the construction shownthe beaters are arranged in a circle near the circumference of thecasing in a plurality of sets, each set comprising two or moreconcentric rows of beater-arms and means for rotating the adjacent rowsof arms in opposite directions. This is accom lished by roviding twoseries of short sha 'ts, the sha ts 2, 3, 4, 5, and 6 of one set beingarranged to project through one-side of the easing 1 and shafts 7, 8,9,10, and 11 of the ot er set being arranged to project through theopposite side of the casing in alinement with the corresponding shaftsof the first set. On the adjacent ends of the two sets of shafts aremounted'the beater-heads 12, 13, 14, 15, and 16 and 17, 18, 19, 20, and21, respectively. Each of the beater-heads is pro' vided with one ormore rows of concentricallyarranged beater-arms, the heads 12, 13, 14,15, and 16, as illustrated being provided with two rows of arms 22-and23, 24 and 25, 26 and 27,28 and 29, 3,0 and 31, respectively. The heads17 18, 19, 20, and 21, as

shown, are provided with a single row of beater arms 32, 33, 34, 35, and36, respectively.'

The sets of short shafts 2, 3, 4, 5, and 6- and 7', 8, 9, 10, and 11 maybe driven by any suitable driving mechanism. The shafts of each set,however, are preferably driven in the same direction, as in this way theadjacent portions of the side-by-side sets of heaters are caused to movein opposite directions, so that the material flying off from one set ofbeaters will come into contact with an oppositely-moving set of beatersor with the o positely-moving material thrown off there rom. The twosets of shafts, however, and the set of heaters carried thereby arepreferably driven in opposite directions, so that the adjacentconcentric rows of beaterarms will move in opposite directions. Asshown, each of the shafts 2 to 11, inclusive, is provided with adriving-pinion, the pin-' ions on one side of the machine beingrepresented by the number 37 and those on the opposite side of themachine by the number 38. A driving-shaft 39 passes directly through thecenter of the machine, the same being supported in suitable bearings 4041, which are formed in the standards 42 and 43. These standards arealso provided with bearings for the outer ends of the two sets ofbeatershafts, the bearings in the standard 42 for the shafts at one sideof the machine being re resented by the number 44 and those in t estandard 43 for the other side of the machine by the number 45.Driving-shaft 39 is provided at one side of the machine with an externaldriving-gear 46, ada ted to mesh with each of the pinions 37, an at theother side of the machine with an internal drivinggear 47, adapted tomesh with each of the pinions 38, A suitable driving-pulley 48 isprovided on the shaft 39.

One set of heaters 14 19 is preferably arranged at the bottom of thecasing, and the outermost row of beater-arms 26 is preferably providedwith one or more scrapers 50,

adapted to move close to the bottom of the chamber, so as to prevent thesettling therein of any of the material being pulverized. The lead inthe comminuted condition above described is su plied to thepulverizing-chamher through t e opening 51, arranged at or near thecenter of the casing, a suitable feed chute or hopper being provided tofacilitate this operation.

' For the purpose of discharging the pulverized lead from the chamberwhen it has reached a suitable degree of fineness the casing is providedwith a discharge-opening 56, which is preferably arranged at or near thetop of the chamber, and said opening is connected by a pi e or passage57 to the suctionport of an exliaust fan or blower 58. Thedelive1y-passage'59 of the fan 58 may be connected to a suitablecollectin -chamber in the ordinary manner. Any other suitable means maybe provided for maintaining a current of air through thepulverizing-chamber.

It follows from this construction that all of the lead introduced intothe pulverizingchamber will be kept in a state of rapid m0- tion andwill be continually coming in contact with oppositely-moving parts orparticles, whereby it will be rapidly and efficiently reduced to apowder and will not be delivered from the casing until it has beenreduced to a fine state, such that it may be conveyed in opposition tothe force of gravity by the current of air produced byv the fan. Byregulating the speed of the fan, therefore, and the consequent velocityof the current of air the degree of fineness ofthe metal delivered fromthe pulverizing-chamber may be nicely controlled. The velocity of thecurrent of air, however, will be made so moderate as not to convey thelead out of the pulverizing-chamber until ithas been reduced to animpalpable powder. The speed of rotation of the beater-heads will dependupon their size. with beater-heads having a diameter of about sixteeninches the best results are produced by rotating the heads at a speed ofabout eight hundred revolutionsper minute.

The herein-described processes of causing I have found that z thepowdered lead to chemically unite with other substances are not claimedherein, as the same form the subject-matter of two copendingapplications, Serial No. 51,151, filed March 14, 1901, and Serial No.97,848, filed March 12, 1902.

Having thus described my invention, what I desire to secure by LettersPatent is 1. As a new article of manufacture, metallic lead in the formof an impalpable powder or dust.

2. As a new article of manufacture, a powder consisting of metallic leadreduced to such a fine state that it may be conveyed in opposition tothe force of gravity by a moderate current of air.

3. As a new article of manufacture, an impalpable powder or dustproduced by pulverizing metallic lead in a dry state.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN W. BAILEY.

I/Vitnesses EDWIN SEGER, J. H. FREEMAN.

